Rotary electric switch



Feb. 16, 1937. M. zUcKERMAN ROTARY ELECTRIC SWITCH Filed NOV. 26, 1935www .V ATTORNEYS JiZDn Zuckerman BY WMA/7 WITNESS ES Patented Feb. 16,1937` 2,071,099

UNl'rED STA'll-:sv PATENT oFFlcE ROTARY ELECTRIC SWITCH MiltonZuckerman. New York, N. Y., alaignor to Irving Haal, New York, N. Y.

Application November 26, 1935, Serial No. 51,685 3 Claims. (Cl. ZIN-155)This invention relates to electric switches and there extend auxiliarybores I and l so that the particularly to an improved rotary switch, anrespective wires I and II may extend thereobject being to provideasimple construction through andbeconnected by the clamping screwswherein a ring may be grasped and partly ro- I2 and I3 to the ears Il ofthe respective statated to close or open the switch according to tionaryfixed contacts Il and Ii, These conthe direction of rotation. tacts areidentical in construction and have their Another object of the inventionis to provide contact faces extending into the groove 5 as a rotaryswitch wherein the switch mechanism shown in Fig. 3. is connected toonly one of the wires of a circuit. When the parts are in the positionshown in lo A further object is to provide a rotary electric Fig. 3 withthe wires I0 and II connected to the 10 switch having a tubular body forreceiving a screws I2 and I3, it is only necessary to eleccable carryinga pair of conductors, the same trlcally Connect the two Contacts I5 andI6 in being associated with a rotary switch structure order to close thecircuit. This is done by a permanently 'associated with the body andmovable contact or closure contact I1 which is formed to rotate in onedirection or in either substantially elliptical in shape as indicated in1;,

of two directions and at certain points of rotadotted lines in F18- 5-Preferebly the movable tion to close en electric circuit. Contact l1 ise comparatively heavy piece of In the accompanying drawing; metal and isprovided with an aperture through Fig. 1 is a, vertical sectional viewthrough a which the reduced end I8 of the Screw I9 exrotary electricswitch disclosing an embodiment tends. The end portion or extension I8is upset 20 of the invention; but preferably the movable contact I1 isfreely Fig. 2 is a sectional view through the switch rotatable on theextension I8. This permits a shown in Fig. 1, the same being on the lineperson to use a screw driver in rotating the screw 2 2; I9 to theposition shown in Fig. 2 so that the Fig. 3 is an elevation of the bodyof the switch movable Contact Il willbe engaging the station- 25 shownin Fig. 1; ary contacts I5 and I6. If it is desired to re- Fig. 4 is aperspective view of one of the stamOVe the hand 11D8 4 iS it onlynecessary to tionary or fixed contacts shown in Fig. 3; rotate screw I9in a reverse direction and this Fig. 5 is a view similar to Fig. 3 butwith the will pull the movable contact I1 upwardly into 3 rotary ringmounted thereon and with a modithe notch 20 of ring 4, whereupon thering' may 30 ed structure associated therewith; be Sld Off Of the bodyl. It Will be understood Fig. 6 is a sectional view through Fig. 5 onthat the body l may be made from any desired line 6 6; insulatingmaterial and also the ring may be Fig. '1 is a sectional view throughFig. 5 on line made from any desired insulating material, aS

1 1; for instance rubber, wood, bakelite, porcelain, or 35 Fig. 8 is aView similar to Fig. 1 but showing the like.

a slightly modiiled construction; When the parts are in the positionshown in Fig. 9 is a view similar to Fig. 8 but showing Figs. 1 and 2the circuit is closed. If the ring a Second modified construction 4 isrotated for a quarter of a revolution or 40 Referring to theaccompanying drawing by slightly more, the movable contact I1 will move40 f numeral, I indicates the body of the switch and out of engagementWith the stationary contacts 2 a cable having portions extending intothe and thereby the Circuit Will become broken. bore 3 of body I. Arotary ring 4 is rotatamy When it is desired to again close the contact,mounted on body I and positioned centrally ring 4 may be moved book toits former posithereof as illustrated in Fig. 1. When the switch tion orthe original rotation may continue until 45 is connected up to be inoperative position and the movable contact I1 engages the stationary thecurrent is turned on, it is only necessary to contact from the oppositeends. grasp the ring 4 and move the same to one po- Under somecircumstances it may be desirable sition to open the circuit and to movethe same to have more than one pair of stationary conto a secondposition to close the circuit. As tacts in groove 5. This may be donewithout de- 5o shown in the drawing the ring 4 and associated partingfrom the spirit of the invention as clearly parts are illustrated withthe circuit closed. illustrated in Figs. 5 to 7. In these figures itBody I is not only provided with the bore 3 but will be observed thatthere are two stationary with an annular groove 5 with notches 6 and 1contacts I5 and two stationary contacts I6.

offset therefrom. From the notches 6 and 1 The two contacts I5' areconnected by a con- 55 ductor 2| vas shown particularly in Fig. l. Thecontacts II' are likewise connected by a conductor 22. The remainingparts ot the device are the same as the preferred form. vIt will,however, be understood that the movable contact l1 and in fact all partsare proportioned so that contact l1 may be moved completely out ofengagement with any oi' the stationary contacts or into engagement witheither pair. This structure permits theecircuit to be opened with acomparatively short movement of the'hand ring 4 and also permits it tobe closed by a comparatively short movement.

In Fig. 8 a slightly modiiied structure is shown to that illustrated inFig. 1, wherein a double pole switch formation is presented instead oi asingle pole formation. In this form o! the invention there arediametrically opposite movable contacts I'l' so that the circuit( isclosed and opened at two points when the ring l is moved to twodiilerent positions.

In Fig. 9 a selective pole switch is shown wherein there is provided acommon return 23 and two sets of stationary contacts I6". As shown inFig. 9 one circuit is closed, but ii' the ring l was rotated for a'halfrevolution the other circuit would be closed and the ilrst circuitopened. This form of switch is good for heating pads and otherelectrical devices where diii'erent circuits are adapted to be switchedon to a given article.

I claim:

1. A rotary switch comprising a tubular body having a peripheral groovein the outer surface, oppositely positioned notches also in the outersurface merging into said groove and an independent auxiliary boreextending from each of the notches to the interior of the body whereby aconductor may extend into the body from each end and then through saidauxiliary bores to said notches, a stationary contact having a portioniltting into each of said notches and positioned to engage conductorsextending into the notch and portions extending into said groove, a ringsurrounding part of said body and covering said groove, and a movablecontact carried by said ring positioned to be moved into said groove toprevent displacement of the ring with respect to said body, said movablecontact being adapted to be moved along said groove to a positionbetween said stationary contacts to electrically connect the same.

2. A rotary switch comprising a hollow body having an annular groove inthe outer surface and passageways extending from the interior to thegroove, a pair of contacts arranged in the groove and positionedopposite each other with portions extending into said passageways, arotatable ringy having a bore of slightly greater diameter than s aidbody normally covering said groove. a movable contact adapted to bemoved by said ring into and out of engagement with said stationarycontacts. and a screw member carried by said ring for moving saidmovable contact into and out of said groove. said screw normallysuspending said movable contact in said grooves so that the contact mayact to hold said ring against displacement in respect to said body.

3. A rotary switch for electric wires comprising an elongated bodycircular in cross-section formed with a longitudinally positioned boreex.- tending from one end to the other for receiving the ends ofelectric wires, an annular groove substantially midway between the endsof said body in the outer surface merging into a notch on each side ofthe groove and diagonally extending auxiliary bores extendingrespectively from said notches to said longitudinallypositioned bore, astationary contact positioned in said annular groove on each sidethereof, each of said contacts having an extension, the respectiveextensions projecting into the respective notches, a clamping screw foreach of said extensions for connecting conductors to said extensions andfor clamping said contacts rmly to said body, a ring having a bore ofgreater diameter than said body positioned to surround part of said bodyand cover said annular groove and said notches, and a movable contactcarried by said ring and positioned to project into said groove forpreventing longitudinal displacement of the/ring on said body, saidmovable contact being of a size .to move between said stationarycontacts and engage the saine when the ring has been rotated to apredetermined position.

MILTON ZUCKERMAN.

